At 28mm, the Lady-Datejust reference 279384RBR-0016 is built around a White Rolesor case — Rolex's combination of Oystersteel and white gold — featuring a monobloc middle case, screw-down case back, and a screw-down winding crown with Twinlock double waterproofness. The bezel is set with diamonds, while a scratch-resistant sapphire crystal with a Cyclops lens over the date sits above the dark grey dial marked with Roman numerals. Water resistance reaches 100 metres / 330 feet.
Power comes from the Calibre 2236, a self-winding mechanical movement manufactured by Rolex. It features a Syloxi silicon hairspring with patented geometry, Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and a power reserve of approximately 55 hours. Precision is rated at -2/+2 seconds per day after casing, and the movement carries Superlative Chronometer certification — meeting both COSC standards and Rolex's own post-casing requirements.
The watch rides on an Oystersteel Oyster bracelet constructed from three-piece solid links, secured by a folding Oysterclasp with an Easylink 5mm comfort extension link. Functions include centre hour, minute, and seconds hands, an instantaneous date display with rapid setting, and stop-seconds for precise time adjustment.
